<!--
  $Id: fixedpoints.html,v 1.8 2012-07-17 08:22:19 gaudenz Exp $
  Copyright (c) 2006-2010, JGraph Ltd
  
  Fixed points example for mxGraph. This example demonstrates using
  fixed connection points for connecting edges to vertices.
-->
<html>
<head>
	<title>Fixed points example for mxGraph</title>

	<!-- Sets the basepath for the library if not in same directory -->
	<script type="text/javascript">
		mxBasePath = '../src';
	</script>

	<!-- Loads and initializes the library -->
	<script type="text/javascript" src="../src/js/mxClient.js"></script>

	<!-- Example code -->
	<script type="text/javascript">
		// Program starts here. Creates a sample graph in the
		// DOM node with the specified ID. This function is invoked
		// from the onLoad event handler of the document (see below).
		function main(container)
		{
			// Checks if the browser is supported
			if (!mxClient.isBrowserSupported())
			{
				// Displays an error message if the browser is not supported.
				mxUtils.error('Browser is not supported!', 200, false);
			}
			else
			{
				// Enables crisp rendering of all shapes in SVG
				mxRectangleShape.prototype.crisp = true;
				
				// Creates the graph inside the given container
				var graph = new mxGraph(container);
				graph.setConnectable(true);

				graph.getAllConnectionConstraints = function(terminal)
				{
					if (terminal != null && this.model.isVertex(terminal.cell))
					{
						return [new mxConnectionConstraint(new mxPoint(0, 0), true),
					    	new mxConnectionConstraint(new mxPoint(0.5, 0), true),
					    	new mxConnectionConstraint(new mxPoint(1, 0), true),
					    	new mxConnectionConstraint(new mxPoint(0, 0.5), true),
							new mxConnectionConstraint(new mxPoint(1, 0.5), true),
							new mxConnectionConstraint(new mxPoint(0, 1), true),
							new mxConnectionConstraint(new mxPoint(0.5, 1), true),
							new mxConnectionConstraint(new mxPoint(1, 1), true)];
					}

					return null;
				};
				
				// Connect preview for elbow edges
				graph.connectionHandler.createEdgeState = function(me)
				{
					var edge = graph.createEdge(null, null, null, null, null, 'edgeStyle=elbowEdgeStyle');
					
					return new mxCellState(this.graph.view, edge, this.graph.getCellStyle(edge));
				};

				// Disables floating connections
				graph.connectionHandler.isConnectableCell = function(cell)
				{
				   return false;
				};
				mxEdgeHandler.prototype.isConnectableCell = function(cell)
				{
					return graph.connectionHandler.isConnectableCell(cell);
				};
				
				// Enables rubberband selection
				new mxRubberband(graph);
				
				// Gets the default parent for inserting new cells. This
				// is normally the first child of the root (ie. layer 0).
				var parent = graph.getDefaultParent();
								
				// Adds cells to the model in a single step
				graph.getModel().beginUpdate();
				try
				{
					var v1 = graph.insertVertex(parent, null, 'Hello,', 20, 20, 80, 60,
						'shape=triangle;perimeter=trianglePerimeter');
					var v2 = graph.insertVertex(parent, null, 'World!', 200, 150, 80, 60,
						'shape=ellipse;perimeter=ellipsePerimeter');
					var v3 = graph.insertVertex(parent, null, 'Hello,', 200, 20, 80, 30);
					var e1 = graph.insertEdge(parent, null, '', v1, v2,
						'edgeStyle=elbowEdgeStyle;elbow=horizontal;'+
						'exitX=0.5;exitY=1;exitPerimeter=1;entryX=0;entryY=0;entryPerimeter=1;');
					var e2 = graph.insertEdge(parent, null, '', v3, v2,
						'edgeStyle=elbowEdgeStyle;elbow=horizontal;orthogonal=0;'+
						'entryX=0;entryY=0;entryPerimeter=1;');
				}
				finally
				{
					// Updates the display
					graph.getModel().endUpdate();
				}
			}
		};
	</script>
</head>

<!-- Page passes the container for the graph to the program -->
<body onload="main(document.getElementById('graphContainer'))">

	<!-- Creates a container for the graph with a grid wallpaper -->
	<div id="graphContainer"
		style="overflow:hidden;width:321px;height:241px;background:url('editors/images/grid.gif');cursor:default;">
	</div>
</body>
</html>
